The late Palaeozoic was an important period of tectonic evolution for the northern margin of the North China Craton (NCC). The source(s) and tectonic setting of early Permian granitoid rocks emplaced along the northern margin of the NCC are still unclear. These granitoids formed between ~295.4–276.1 Ma (uncertainties ranging from ±1.5 to ±7.8 Ma) according to zircon laser ablation inductively coupled mass spectrometry (LA-ICP-MS) and sensitive high-resolution ion microprobe (SHRIMP) U-Pb data. The Dadongou (DDG) pluton is an A1-type granite and the Dananfangzi (DNFZ) pluton is an A2-type granite. The Erdaowa (EDW), Lisicun (LSC), Wuhai (WH) and Gehuasitai (GHST) plutons are I-type granites. The Yuanbaoshan (YBS) dykes are diorite and syenodiorite. All the granitoids are enriched in large ion lithophile elements and light rare earth elements, depleted in high field strength elements and have negative εNd(t) and εHf(t) values. The A1-type granite was formed by the melting of the mafic crust. The A2-type granite was derived from partial melting of tonalite gneiss from the NCC crust and mantle materials. The EDW, LSC, WH and GHST granites mainly originated from partially melted granulite, with some mantle input. The YBS dykes are formed by the magma mixing of hot mantle melt and the relatively cold crustal magma. The northern margin of the NCC experienced anorogenic and collision tectonic stages, and the structural setting started to transform to post-collision at the later period of early Permian.

中文翻译：

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华北克拉通北缘中部的早二叠世花岗岩浆作用：成因，成因和构造背景

古生代晚期是华北克拉通（NCC）北缘构造演化的重要时期。NCC北缘的早二叠世花岗岩岩石的来源和构造环境尚不清楚。根据锆石激光烧蚀电感耦合质谱法（LA-ICP-MS）和敏感的高分辨率离子微探针（SHRIMP）U-Pb数据，这些类花岗岩形成于〜295.4–276.1 Ma（不确定性范围为±1.5至±7.8 Ma）之间。大东沟（DDG）岩体是A1型花岗岩，而大安子子（DNFZ）岩体是A2型花岗岩。埃道瓦（EDW），利西村（LSC），乌海（WH）和格华斯泰（GHST）岩体是I型花岗岩。元宝山（YBS）脉代为闪长岩和亚闪长岩。所有的类花岗岩都富含大型的离子亲石元素和轻稀土元素，耗尽了高场强元素，并具有负εNd（t）和εHf（t）值。通过镁铁质地壳的熔化形成了Al型花岗岩。A2型花岗岩是由NCC地壳和地幔材料中的斜长石片麻岩的部分熔融而得的。EDW，LSC，WH和GHST花岗岩主要来源于部分熔融的花岗石，并有一些地幔投入。YBS堤系是由热的地幔熔体和相对较冷的地壳岩浆混合而成的。NCC的北缘经历了造山作用和碰撞构造阶段，在早二叠世后期，构造环境开始转变为后碰撞。A2型花岗岩是由NCC地壳和地幔材料中的斜长石片麻岩的部分熔融而得的。EDW，LSC，WH和GHST花岗岩主要来源于部分熔融的花岗石，并有一些地幔投入。YBS堤系是由热的地幔熔体和相对较冷的地壳岩浆混合而成的。NCC的北缘经历了造山作用和碰撞构造阶段，在早二叠世后期，构造环境开始转变为后碰撞。A2型花岗岩是由NCC地壳和地幔材料中的斜长石片麻岩的部分熔融而得的。EDW，LSC，WH和GHST花岗岩主要来源于部分熔融的花岗石，并有一些地幔投入。YBS堤系是由热的地幔熔体和相对较冷的地壳岩浆混合而成的。NCC的北缘经历了造山作用和碰撞构造阶段，在早二叠世后期，构造环境开始转变为后碰撞。